Paul Notzold's artworks allow an audience to SMS and interact with large speech bubbles projected onto a flat surface, like the facade of a building. The bubbles are positioned near windows and doors to encourage an audience to create the conversations happening inside. The public audience receives a flyer with a cell number and simple instructions. A participant sends a text message to the provided phone number and it is then displayed inside the speech bubble. Multiple bubbles may be used and the audience can direct their input to a specific bubble.
Not always an urban and outdoor experience, the concept has translated into the more traditional enviroment of the gallery with 'One Of You Will Betray Me', an image of the last supper that allows the audience to create the dialogue of the famous scene.